01 -
Preheat your oven to 375°F (190°C). Lightly grease a 9x13 inch baking dish. This prepares your vessel for the delicious Easy Homemade Chicken Pot Pie Casserole, ensuring easy cleanup and even cooking.
02 -
In a large skillet or Dutch oven, melt 1/4 cup unsalted butter over medium heat. Add 1/2 cup yellow onion, diced, and cook for 3-4 minutes until softened. Stir in 2 cloves garlic, minced, and cook for another minute until fragrant.
03 -
Sprinkle 1/4 cup all-purpose flour into the skillet with the aromatics, whisking constantly for 1 minute to create a roux. Gradually whisk in 2 cups chicken broth and 1 cup whole milk until smooth. Bring to a gentle simmer, stirring until thickened.
04 -
Stir 1 tsp dried thyme, 1/2 tsp salt, and 1/4 tsp black pepper into the thickened sauce. Add 2 cups cooked chicken, shredded, and 16 oz frozen mixed vegetables (peas, carrots, corn). Mix well to combine all ingredients for your Easy Homemade Chicken Pot Pie Casserole filling.
05 -
Pour the chicken and vegetable mixture into the prepared 9x13 inch baking dish, spreading it evenly. Open the 1 (16.3 oz) can refrigerated biscuit dough (8 biscuits) and arrange the biscuits on top of the filling.
06 -
Bake for 30-35 minutes, or until the biscuits are golden brown and cooked through, and the filling is bubbly. For the best Easy Homemade Chicken Pot Pie Casserole, let it rest for 5 minutes before serving to allow the sauce to set.